PARKERIACEAE-—SCHIZAEACEAE 49 
PARKERIACEAE 
CERATOPTERIS Brongniart 
Najas ? obvoluta Blanco FI. Filip. ed. 2 (1845) 460 (sp. nov.); ed. 3, 3 
(1879) 66=CERATOPTERIS THALICTROIDES Brongn. 
This species is widely distributed in the Philippines at low 
altitudes but is rare in and about Manila. The species was 
placed in Najas by Blanco with expressed doubt. 
Illustrative specimen from Lamao, Bataan Province, Luzon, 
February, 1913 (Merrill: Species Blancoanae No. 290). 
SCHIZAEACEAE 
LYGODIUM Swartz 
Ugena alba Blanco Fl. Filip. (1837) 823 (sp. nov.) ed. 2 (1845) 569; ed. 
8, 3 (1879) 288=LYGODIUM FLEXUOSUM Sw. 
Blanco’s description applies better to Lygodium flexuosum 
Sw., than to L. scandens Sw., although Fernandez-Villar reduced 
Ugena alba to the latter species. There is very little doubt but 
that Blanco included in Ugena alba both Lygodium flexuosum 
Sw. and L. scandens Sw., and possibly also L. japonicum Sw. 
All three species are common and widely distributed in the 
Philippines. 
Illustrative specimen from Angat, Bulacan Province, Luzon, 
September, 1913 (Merrill: Species Blancoanae No. 347). 
Ugena semihastata Cav.; Blanco Fl. Filip. (1837) 822; ed. 2 (1845) 568; 
ed. 3, 3 (1879) 237 p.p.=LYGODIUM SEMIHASTATUM (Cav.) Desv. 
Blanco’s description is in part that of Lygodium semihastatum, 
but this part may have been taken from Cavanilles’s description. 
Lygodium semihastatum is a perfectly valid species, entirely dis- 
tinct from L. flexuosum Sw. to which it has been reduced. For 
a discussion of this see below. 
Illustrative specimen from Malicboi, Tayabas Province, Luzon, 
December, 1914, comm. D. L. Topping (Merrill: Species Blan- 
coanae No. 739). 
Ugena semihastata Cav.; Blanco Fl. Filip. (1837) 822; ed. 2 (1845) 568; 
ed. 3, 3 (1879) 237, p.p.=LYGODIUM CIRCINNATUM (Burm. f.) 
Sw. 
Blanco manifestly included two species in his description, one 
the true Ugena semihastata Cav. = Lygodium semihastatum 
(Cay.) Desv., and the other L. circinnatum Sw. Lygodium semi- 
hastatum (Cav.) Desv. is a perfectly valid species, entirely 
distinct from L. fleruosum Sw. to which it is reduced in Christen- 
sen’s Index Filicum. It is much less common in the Philippines 
than is L. circinnatum Sw. It is suspected that Blanco took the 
151862——4 
